Rendering

Rendering of a map is the process of making a visual image on the basis of raw geospatial data and tags. The word often applies more specifically to the production of a raster image, or a set of raster tiles, but it can refer to output in a vector-based format. "3D rendering" is also possible taking map data as an input. The ability to render maps in new and interesting styles, or highlighting features of special interest, is one of the most exciting aspects having open access to geodata. Developers in and around the OpenStreetMap community have created a wide variety of software for rendering OpenStreetMap data. The data can also be converted to other data formats for use with existing rendering software.

Rendering on OpenStreetMap servers

The most obvious examples of rendering OpenStreetMap data, are those found on the openstreetmap.org homepage. Click the layer picker button on the right to switch between layers showing different rendering styles. There are several layers created using Mapnik software including the default 'Standard' layer. To understand more about the infrastructure involved in rendering and serving these tiles' map styles, see Component overview and Mapnik Rendering.

There are limitless dimensions of flexibility involved in rendering. Most rendering software supports some kind of stylesheet for controlling things like colour, line widths, text orientation, icons for points of interest, and many very subtle visual factors.

Server and command line tools

NameTarget platformsTarget languagesLicenseNotes
CartoJavaScriptN/AApache v2 convert CartoCSS style sheets into Mapnik's own XML styling language
MapnikWindows, macOS, LinuxC++, JavaScript, Python, Ruby, JavaLGPLThe most popular server-side 2D map renderer. Requires PostgreSQL and various C++ libraries. Designed to be fast and is suitable for tile generation on high-end servers but it isn't particularly easy to set up.
MapOSMaticCross-platformPythonAGPLv3Can render maps with a grid and street index. Written in Python/Django + mapnik.
SmrenderCross-platformCGPLv3a rules-based rendering engine written in C
TileServer GLCross-platformBSDTile server for raster and vector tiles.
TileSweepLinux, macOSC, JSXMITTile server with prerendering using libmapnik.
Map Machine Cross-platform Python MIT A simple renderer for OpenStreetMap with custom icons intended to display as many tags as possible.

Client-side GUI applications

NameTarget platformsLicenseNotes
Kendzi3dJava SEBSDPlugin for JOSM, allows viewing of edited data in 3D
KosmtikNode.jsWTFPLCartoCSS style development tool (style preview) based on Mapnik.
MaperitiveWindows, macOS, LinuxProprietarylocal file (.osm, .osm.bz2 and GPX) desktop rendering application, with rendering rules defined in a text file. Generates BMP, PNG and SVG output. Not designed for high performance rendering or huge volumes of data, but easy to set up and flexible, and a good option for one-off rendering (e.g. a map of your city). It also has a tile generator, hillshading, elevation colouring and lots of other features.
OSM2WorldJava SELGPLTool that creates 3D realistic models from OSM data files
OSMBuildingsJavaSript (WebGL)...Tool that creates 3D models from OSM data files
OSM goJavaScriptGPLTool that creates 3D simple models with selectable OSM-Objects from OSM data files
PhototilerLinux, macOS, WindowsProprietaryA tool to create high quality maps using photo-realistic shading and vector tile data.
TileMillWindows, macOS, Linux3-clause BSDdevelopment environment for CartoCSS styles

Client-side libraries

Main article: Frameworks
NameTarget platformsTarget languagesLicenseNotes
Carto Mobile SDKAndroid, iOS, Windows PhoneJava, Objective-C++, Swift, C#BSDSupports 3D city overlays, editable vector overlays and is highly customizable.
CartoTypeWindows, iOS, Android, macOS, Unix, Web AssemblyC++, C#, Java, Swift, Objective CProprietaryRendering and routing library. Uses OpenGL ES hardware acceleration. Customizable style sheets and route profiles. Supports perspective and 3D buildings.
GLMapiOS, AndroidObjective-C, Swift, JavaProprietaryOffline or online vector map rendered on device using OpenGL ES
libosmscoutLinux, macOS, iOS, Windows, Android, QtC++, JavaLGPLOffers simple, high-level interfaces to offline rendering and routing functionalities based on OpenStreetMap data.
Mapbox Android SDKAndroidJavaProprietary (starting with v9.3.0)[1], BSD+JSON<[2] (earlier versions)Displays Mapbox Vector Tiles in a slippy map using OpenGL ES.
Open source fork continued by community as MapLibre GL Native.
Mapbox GL JSWebJavaScriptProprietary (starting with v2)[3], BSD (until v1.13)Displays Mapbox Vector Tiles in a slippy map using WebGL.
Open source fork continued by community as MapLibre GL JS.
Mapbox iOS SDKiOSObjective-C, Swift, Interface BuilderProprietary (starting with v5.10/6.0)[4], BSD+JSON[2] (earlier versions)Displays Mapbox Vector Tiles in a slippy map using OpenGL ES.
Open source fork continued by community as MapLibre GL Native.
Mapbox macOS SDKmacOSObjective-C, Swift, Interface Builder, AppleScriptBSD+JSON[2]Displays Mapbox Vector Tiles in a slippy map using OpenGL
Mapbox Qt SDKQtC++BSDDisplays Mapbox Vector Tiles in a slippy map using OpenGL
Mapbox Unity SDKCross-platformC#Apache/BSDProvides data for generating custom 3D scenes in Unity
MapLibre GL Web JavaScript BSD Community led fork derived from Mapbox GL JS v1.13 prior to their switch to a non-OSS license
MapLibre GL Native Android, iOS Java, Objective-C, Swift, Interface Builder BSD Community led fork derived from Mapbox GL Native 1.6.0 prior to their switch to a non-OSS license
MapsforgeAndroid, Java MEJavaLGPLv3free and open toolbox that enables the community to easily create new OpenStreetMap-based applications. Provided tools and APIs include solutions for map rendering, route planning and navigation, POI indexing and search, map overlays and more.
TangramWebJavaScriptMIT2D and 3D map renderer using WebGL
Tangram ESAndroid, iOS, Linux, macOSC++MIT2D and 3D map renderer using OpenGL ES
Prettymaps Cross-platform Python MIT 2D raster and vector graphics rendering using Python. Based on osmnx, matplotlib and shapely libraries.

Historical

The following renderers are no longer maintained but are of historical interest:

  • AlaCarte - A tile rendering engine for Windows and Linux. No project progress since 2016. AGPL
  • Hardware accelerated real-time rendering, .NET, proprietary, using graphics card to render images in real-time, instead of displaying prerendered tiles
  • Kartograph – AGPL licensed Python framework to create SVG maps, officially dead since 2016
  • Kartograph, LGPL, JavaScript library to display vector generated maps in any browser
  • Kothic JS – JavaScript, BSD, full-featured JavaScript map rendering engine using HTML5 Canvas. It was initially developed as a JavaScript port of Kothic.
  • Kothic – GPLv3 licensed, Python, a MapCSS/0.2 python rendering engine (project is dead, last activity in 2015)
  • LunaRender, Windows, Lua, MIT license, XML2SVG renderer
  • Mapweaver - Successor of mapgen.pl Perl rendering, OSM to SVG and with Inkscape to PNG or PDF, automatic map key. Supports street and POI lists, grids and coordinate overlays. Automatic extraction of desired place out of OSM file. Not running under Windows.
  • MapSurfer.NET - proprietary, .NET, framework for map styling and publishing (rendering, caching) geospatial data to the web
  • Memphis – a map-rendering application and a library for OpenStreetMap written in C using eXpat, Cairo and GLib. It's licensed under the terms of the GNU Lesser General Public License.
  • Osmarender - XSLTs which does OSM XML to SVG transformation. tiles@home was a project which uses Osmarender to create a tile set for serving a map layer alongside Mapnik's, but Osmarender can also be a good option for doing one-off renderings. SVG format allows you to do post-processing tidy up tweaks (see other options below). It was withdrawn from the main map at osm.org on 1th March 2012.
  • osmbrowser – can load large areas of OSM data and render them in vector graphics.
  • osmrender.pl - simple maps easily drawn with a Perl program. Uses *.osm as input.
  • XNavigator, Java SE, GPLv2, 3D renderer, last release in 2012 according to OSM wiki page
  • Osm2pov - Tool for creating isometric maps from OSM data
  • Pyrender – a collection of ideas, and some code in Python for various rendering server steps
  • VTM – cross-platform vector tile renderer developed by the OpenScienceMap project


See also

Notes and references

  1. Contains Mapbox GL Native binary licensed under Mapbox Terms of Service. Starting with Mapbox GL Native 1.7.0, Mapbox GL Native is distributed as binary only.
  2. 1 2 3 Contains dependency licensed under JSON license.
  3. Starting with version 2.0.0, Mapbox GL JS is licensed under Mapbox Terms of Service and must only be used by clients of Mapbox.
  4. Contains Mapbox GL Native binary licensed under Mapbox Terms of Service. Starting with Mapbox GL Native 1.7.0, Mapbox GL Native is distributed as binary only.
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